Sim, você pode usar o aplicativo de webmail da área de trabalho, por exemplo. link
E coloque o seguinte no arquivo /usr/share/applications/desktop-webmail.desktop
:
[Desktop Entry]
Encoding=UTF-8
Name=Desktop Webmail
GenericName=Email
Comment=Compose email in browser
Comment[de]=EMail in Browser schreiben
Exec=desktop-webmail %U
Icon=desktop-webmail
Terminal=false
Type=Application
StartupNotify=true
Categories=Application;Network;Email
MimeType=x-scheme-handler/mailto
X-Ayatana-Desktop-Shortcuts=Compose
[Compose Shortcut Group]
Name=Compose New Message
Exec=desktop-webmail mailto:%U
TargetEnvironment=Messaging Menu;Unity